johk b



UNITED STATES OHN B. JONES, on BROOKLYN, NEW YORK,-

ALLOY 'FOR COATING METALS.

SPECIFICATION forming pait' of Letters Patent No. 293,886, datedFebruary 19, 1884.

Application filed l Tuly 15,1882. (No specimens.) Patented in CanadaSeptember 1, 1883, No. 17,575.

To all whom it may concern:

Be it known that I, J OHN B. J ONES, of Brooklyn, in the county of Kingsand State of New York, have invented an .Alloy for Goating Metals, ofwhich the following specification is a description.

The object of my invention is the production of a compound metal oralloy for deoxidizing and coating iron plates, the-same being eleccostof production of iron plates so coated over tin plates, and improvingthe iron for manufacturing purposes.

My invention consists in a compound metal or alloy composed of metallicsodium, lead, tin, and zinc, compounded for use as a metal bath, intowhich iron plates or sheet-iron iron sheets, or other metal articles areimmersed and deoxidized, and thereby coated, so as to prevent futureoxidation.

To carry my invention into practical effect I employ the followingproportions of metallic sodium, tin, lead, and zinc, viz: one-half tofive parts of metallic sodium in four hundred and eighty parts of thevolume required, so

that eight hundred and twenty-eight parts of lead, two hundred andthirty-six parts of tin, and three hundred and ninety-one parts of zincwould require from one-half to fifteen parts of metallic sodium. Theseproportions may,however, be varied a little. The metallic sodium, tin,zinc, and lead are to be melted in a-large crucible and thoroughlyintermixed to form my improved alloy. On the surface of this mixture,while in the melted state, I place a vegetable oil or animal fat high incarbon, to prevent oxidation and subserve the general purpose of a fluxbath. This alloy or compound metal may be cast in ingots to be remelted,as desired for use; or it may be poured into the tank or kettle as soonas compounded, the articles to be coated being immersed in the bath inthis tank or kettle in. the usual way until the desired coating isobtained. If

it is desired that the articles or metals coated shall have a white orsilverappearance, I

vary the proportions above given to fifteen to expose them to the actionof the atmosphere, 6o

appearance being of secondary consideration, the proportions stated willbe varied as follows, according to the quantity of alloy required, viz:one hundred and seventy-five to two hundred and sixty-five per cent. oflead 6 and fifteen to one hundred per cent. of zinc,- the proportions ofmetallic sodium and tin remaining as before.

My improved alloy is more electro-positive to the iron and tin alone, ortin and lead,and 7o renders the coated material less liable tooxidation. The use of the metallic sodium i11- creases theelectro-positive character of the al- 10y and diminishes themelting-point of the compound to such an extent that vegetable oils oranimal fats high in carbon canbe employed, and thus oxidation beprevented or arrested, which will not be the case when any alloy nowknown which is electro-positive to the iron is used as a-coating,because any metal or compound metal whose melting-polnt exceeds 500 whenbrought to the working temperature would instantly ignite oils or fats,if employed asdescribed. 1

In use, my improved alloy can be employed 8 5 to coat metals in the samemanner as tinning is now done, instead of operating in the same way asthe more expensive process; of galvanizing;

and thus I can coat metals with my improved alloy at considerably lessexpense than can be done with the galvanizing process.

Metals coated with my improved alloy have as'much if not more resistanceto oxidation than galvanized metals, and much greater resistance thanordinary tin-plate or sheet-tin. 5

' I am aware that it has been proposed to coat metals by dipping them ina bath of molten Y cadmium, or a cadmium alloy, onthe surface of whichis a layer of melted fat, the article to be stantially in the manner andproportions speei- 1o coated being first dipped in a solution ofchlofied,wl1ereby the alloyis rendered electro-posiride of zinc. tive toiron, its melting-point reduced, and OK- I am also aware that it hasbeen proposed idanion destroyed, arrested; or prevented, as 5 to coatarticles of iron in a bath of molten zine, set fort-h.

mercury, and sodium or potassium. J OHN B. JOKES.

What I claim is- An alloy for coating iron, consisting of lead, tin, andzinc, with metallic sodium added, sub- Vitnesses: V

ERNEST G. WEBB, CHAS. DE L. YOUNG.

